Electric controlling system.



PATENTED AUG. 6, 1907.

C. P. BREESE. ELECTRIC CONTROLLING SYSTEM; APPLIUATION FILED AUG 11 1902 BY ATTORNEYS WITNESSES UNITED- sTATEs PATENT OFFER.

CHARLES P-; BREE'snbF NORFOLK,-VIRGINIA, ASSIGNOR To HALL SIGNAL COMPANY, A

To all whom it may concern:

of Norfolk and State of Virginia, have invented certrolling tion.

CORPORATION OF MAINE;

[.1 ELn'o' Rro CONTROLLING- SYSTEM.

Specification of Letters Patent. 1 I Application filed August 1 1902; Serial No. 119,185. c

No. 862,441. Patented A g. 6,1907.

the car to the return conductor or rails 36, which is, in

turn, connected to the dynamo '1. The contact wire is divided into a plurality of contact sections- The 55 'said sections are insulated from each other and receive the current from the main fee d wire. The amount of current which is fed to. the sections is controlled by v instruments associated with'ach of thesaid sections. The contact sections of the contact wire are indicated 60 Be it known that I, OHARLES'P. Benssma citizen. of the United States,'and a resident of Norfolk, county tain new and useful Improvements in Electric. Con- Systems, ofwhich thefollowing is a specifica- This invention relates to meansfor controlling a plurality of motors or other electrical devices located at a distance from thesource of supply.

It particularly relates tomeans for electrically controllinga conveyance, suchas a car, and its object to provide an arrangement of--instrumentalities'which will automatically operate toi'prevent collisions be- "lhe-inventionconsists first inpr'oviding .a meansfor controlling the quantity of current fed'to the-caror conveyance by aninstrument or instruments lovoted in proximity to thecar. ,'The invention consists,

in addition thereto, in providing a means for controlling the quantity'oi current fed to the contact wire, according to the position ofthe car along the wire.

The invention also consists in providing bodies of different resistances for controllingthe amount of cur-' rent led to the said contact wire, an'd'providing means controlled by the current flowingto the contactiwire at one point for changing the circuit connections of the resistance'hody at another point.

The invention further consists in providing a means which will prevent any change-in the" unifor nity of the current fed to the said contact wire at one point until after the circuit at that point between the said contact wire and the return conductor has been broken.

The invention also consists in other features-of construction and combinations of parts'hereinafter de scribed and claimed.

The invention isillustrated in'the accompanying drawings, in which view of some of theparts shown in 1 with convnections. I I v I In Fig. 1', lindicates a dynamo for supplying the Figure 1 illustratesmy'invention as "applied," to a.

railway street car system; and illustrates a detail forming part of the said systerrn. Fig.3 is a detail current to the said system. 2 indicatesithemain feed conductor or wire ior supplying the system at different points alongthe track of the 'car. 3 indicatesa contact wire which feedsthe current to the ear. I The con. nection between-thejcontact' wire 3 andthe car 4 is made by means oi the trolley 5 inthe manner, well known in the'art The circuit on thejti olley ,5, is complet'cd through the switch or-rheostat andthe motorof by the numerals 6', 7 and 8. Three magnets are associated with each of the said sections for controlling the amount of current fed to an adjoining section. These magnets are indicated by numerals 9, 10 and 11 and are-normallyconnected directly in circuit between ,65 .the main feed wire' 2 and the contact sections 6, 7, v8 I 'of'the contact wire 3. The circuits through these "electro-magnets are normally completed through the car 4 as itpasses along the track. The current coming from the. dynamo -1 passes to the main iced wire or 70.

conductor 2 through the connecting wires 12, 13 or 14 to the clectro-magnets 9, 10 or 11, the contact sections 6, 7 or 8, according to the position of the car relative to the said contact wire.,' From the car, the current passes by way .of the return conductor or the rail 36 back to the dynamoila .The electro-magnets l0 and 11 control the electro magnets 15, v 16, which are connected directly to the return conductor 36. Themagnets 15, 16 are also connected to .the main feed wire 2 by the operation of the electro-magncts 10, and

11; that is, the low resistance magnets of a section adjoining to that of the highresistance magnets 15, 16 and 17. High resistance electro-magnets 18, 19 and 20 are also associated with the sections of the contact wire. These elcctro-magnets are connected to the. 5

main feed wire, and may be connected to theco ntact sections by the operation of the magnets 15, 16 and 17. a i The magnets 15, 16 and 17 also control the circuits of the low resistance magnets 9, 10 and 11, the armature of the said magnets 15, 16 and 17 being located between contact point's connected respectively with the magnets 9, 18,10, 19, 1 1, 20, so that when the said magnets 15,16 and 17. are energized, the circuits between the main food wire 2 and the contact sections 6, 7 and 8 are established through magnetslii, 19 and 20 refed to the said contact section than when the .connec- 100, I

tion is madethrough magnets 18, 19 and 20.

! -When a; current isf'ed through, the m g 9, 10 and :11, ,itsquantity is suflici ent tooperatethe motor or I other device of the electric car, but when'the; connection is made through the magnets 18,- 19 and 20, the

' amount of current fed to each of the contact sections is insufiicient to operate the motor or other device of the car, although it may be sufiicient to allow the lamps of 5 the car to slightly glow. The amount of current thus fed to the contact sections may be controlled by the magnets 15, 16 and 17 of the same sections. Magnets 15, 16 and 17 are controlled by the magnets of the ad'- joining sections. If now, the magnets 15, 16 and 17 are controlled by the presence of a car in an adjoining section, the motor or other device of the car located in that section may be controlled by the quantity of current fed to thatsecti'on through the different resistance bodies of that section: Ii,'however, a car should enter one of the said sections, and the electro-magnet controlling the resistance circuits of that section should be energized 'by' the presence'oi a car the succeeding section, the lowresistance circuit will be broken, and the magnet corresponding to the magnets 9,10 and 11 29 will be denergized and cannotbe operated by the presence of thecar in that section therefore, in order to control the magnets used for controlling the resist-' ance circuits'of'a preceding section, a further means is provided in the section to which the car is connected.

This means consists 'in'providing a circuit connection controlled by the highresistance electro-magnets-lB, 19 and 20, which will become energized by the pres V ence'of the car inxtheir respective sections whenthearmature of the electro-magnets 15, 16 and '17"discon-- nect the electro-magnets 9, -10and 11 from-their re spective 'co'ntacrsections', and connectselectro-mag' nets 18, 19 and 201 in series with the contactsect'ions:

When the magnets 18, 19 and 2,0"b ecome-energized,

they draw the 'arrnatures 24, 25 and- 26,; thereby closing circuits 27; i28and 29'respectively,which'lead to the'magnets-corresponding to the magnets 15; 16' and 17. These magnetsals'o become energised-and break the normal connections of the low resistance bodies, and connect the said preceding-contact sections with the highresistancebody'oithat section, thereby reducing the amount (if-current that maybe fed to that 1 section. I h'avethhs provided a'means which will con-- trol the motors rother devices of the; cars, whatever position the cars may be in'relative to tliesaid contact magnet 15will also become denergized. This will section.

If two-cars are located in adjoining sections, the circuit of oneofthe said sections will be through the high,

resistance body. Ifthen, the other carenters' asuc ceeding'section, the circuit of the first-named car "be .reestablished through the low-resistance body by thedenergization' of the magnet corresponding to V the-magnets 15, 16 and 1710f "that section; I prefer,- however, to provide a means to'prevent the reestab lis'h'ment'of ,thecircuit through the low resistance bodies until after the circuit through" the contact sections associated with the said resistance bodiesis broken by the "operator ofthe car. This'will further avoid collision ofvth'ecars, and compel the motorman to break the circuit through the motor or 'otherzdevice fill'loftlie car before he can'again'start the car: This will allow for a resetting of theinstruments and ii-event burning out'of' tlie contacts of the instruments.

- In Fig.2 is illustrated diagrammatically the. rheostat-of a'car motor; 30indicatesthe cylinder containing-the rheostat and controlling the mechanism of the car. 31 indicates a handle for operating the said mechanism, and 32 illustrates a contact cooperating with a segmhntalcontact 33 to break the circuit leading from the contact sections to the return conductor; The contact 32 is connected through the high resistance 40 to the car wheel and from there to the return conductor 36'. The rheostat is connected to the motor in the usual way, and thence to the return conductor 36. The resistance 40 will form a by-pass for the current which will be sufficient to cause the magnets 18, 19 and 20 to operate. The re-setting of the instruments will be accomplished only by breaking the circuit of this by-pass, as well as that of the motor, When this is done, the car may proceed. I I

.The operation of the system is as follows. if a car makes contact with section7 on the contact wire, a circuit will be established from the dynamo 1 to'the main feed wire 2 to the armature 25, the connecting wire 13, the low resistance electro-magnet 10, thence to the section 7, the car 4 located in that section, the return conductor 36 back to the dynamo 1. The current passing through the electro-magnct-.'l0 will cause its armature to make contact with its front contact. This will establish the circuit through the controlling magnet of the preceding section, namely, electromagnet 15. The circuit throughmagnet 15 will be as follows. Dynamo 1, main feed wire 2, armature of magnet 10, connecting wire 21, electm-magnet-JES, return conductor 36 back to dynamo 1. The current passing through the electm-magnet 15 will cause its armature to break contact with its back contact and to make contact with its front contact, thereby changing ,the'connections of the low resistance body and the-high resistance. body. The normal circuit is from themain feed wire through the electro-imagnet 9, to the contact sectionfi, which will be changed to a circuit from the source of current, the main feed wire 2, the high resistance'electrosmagnet 18, the armature of the electromagnet 15, to the contact section 6. it now, the car 4 makes connection with the contact section 8 by means fof-the trolley 5, the fiow-oi'the current through the electro-maguet 10 will cease, 'the electro-magnct 10 will become denergised andthe circuit of the electro-magnetflfi will be broken and the said electrores tablish the :circuits of the conta'ct section 6, but theoperation of the elcctro-magnet 11 of the contact section 8 will produce a similar result in the circuits of the contact 7 to that prodnced'in the circuitsoi contact section 6, when the motor or other device of the car was in'circuit'with' contact 'section- 7 If, however, a

*carmakes contact with the contact section 6 while the car 4 is in circuit with the contact section 7, the

electro magnet 18 will be energized, since a circuit will be established from the mai n feed wire 2 to the electro-niii'gnet 18, the armature of the electro-magnut 15, the contact section. 6, through-the-car in'circuit with the contact section 6 baclk to the return conductor 36.' Inasmuch as the .amouht of current led to the saidcontact section is greatlyldecressed, the car will be'stoppcd-and will not be able to moveforward until after 'the' circuit of thesaid contact section is broken. inasmuch as the electro-magnet 18 also establishes a circuit from the main feed wire to the nrmaturo ilfi.

the contact section 6, through the car in contact with the said contact section 6 back by way of thereturn conductor 36. This circuit will be established independent of the operation of the electro-magnet 15, and consequently, independent oi the operation of any of the instruments of the" adjoining sections. The quan tity of current will, therefore, continue to be'suificiently low to prevent the operation of the moth r or other device until the car in section-.7 moves to section 8, and until the current nvhich. is flowing through the said high resistance electro-magn et 18 ceases, by; breaking circuit .through the motor ofother device and the by-pass. When this is done, thecircuit of contact section 6 will bereestablished to the low resistance clectro-magnet Sand permit the operation of the-motor or other device of the car which is in circuit-with the contact section 6. g r v v Ii car 4 is in contact with contact section 8, and a car is in contact with contact section 7, and there isino car in the section succeeding the contact section 8, the current of contact section 8 will be fed through the low resistance magnet 11, which will close a circuit through the high resistance electro-magnet 16 of contact section 7. This will connect contact section? with the main feedwire, 2 through the high resistance electro-magnet 19, and the amount of the current will diminish so as to prevent the operation of the motoror other device of the car'incontact with the contact section The magnet 19 will, moreover, be energized," whilethe magnet 10 will be denergized' by the operation of the electro} magnet 16. The magnet 19 will close a circuit from the main feed wire 2, armature 25 connecting wire 28, cons necting wir 21, high resistance electr0-magnet 1'5, return conductor 36. The electro-magriet 15wi1l disconnect the low resistance electro-magnet 9 from the .con-' tact section 61 and will connect the high resistance 'elec 'tro-magnet 18 with the contact section 6. This will the car in'contact with contact section 7 makescontact with contact section 8, and until the circuit between the said contact section 6 and'the conductor is broken,

by removing the trolley from the trolley wire.

If'there is a car'in connection with the contact section 6, and a car in'contact with contact section 7;,the

armature of the electromagnet 15 will make contact with itsiiront contact, and the circuit connection of contact section I6will be through thehigh resistance electiomagnet 18. If there is nov car in contact section 8, the 1 car connected with contact section 7 may go. either'for warrior-backward If the carbackssoas to make con: nection with contact section 6,'the circuit connectionswill bethrough the high resistance magnets 18" to con tact section 6 and to the twocars connected to-the said contact section 6, which will prevent the'operation of the said car's until the circuit of both of the said cars is broken, thereby permitting, the armature 35 of the By the above description,.-I. have-set forth one oi the .electro-magnet 18 v to. break connection with its front contact, thus restablishing the circuit.

preferred formsoi inventiomiwhich may housed in directlycontrollin gthe motorof thecar. .Thisinvention, however, may be used:v to cohtrol signals located ,What I claim asnew and desire to secure by Letters Patent, isz- 1. In a .car controlling system the combination of a main feed conductor. a contact conductor divided into insulated sections, each section normally connected with said feed conductor and means whereby two cars connected with the same section automatically control the movements of each other by varying the existing current.

2. In a car controlling system the combination of a main feed conductor, a contact conductor divided into insulated sectioris,'each section normally connected with said feed conductor and means whereby the connection of two cars with one of said sections automatically controls. the strength otcurrent supplied to each car.

' In a car controlling system the combination of a main feed conductor, a contact conductor divided into 'insulatedsections. each section normally connected with said feed conductor, means for varying the resistance of said connectlon and means whereby two cars connected with the same section are mutually controllable. 4. In a car controlling system, the combination of a niainfee conductor, an insulated contact section; a

translating device inserted between the feed conductor and the insulated section through the circuit of which,

section, and means controlled by the prcse nceof a car in said section for interrupting therflow of current through said magnet, substantially as described.

,6 Iri an electric car controlling system, the combination ot a main feed wire, a contact .wire, a return conductor, a high resistance body and a low resistance body connected to the said main feed wire, means for cohnectingeither the said high resistance body or the. said lowrsistance body to the said contact wire.

7. In an electric car controlling system, the combination of a main feedcon'ductor, a contact wire, a return conductorya high resistance body and .a low resistance body 1 'connectedto the main feed conducto'rg'an electro-magnet then prevent the operation of the motor or other device; 7 the mm wire with either the saidof a car in contact with the contact section 6, until after" system, the combination of a main feed wire, acontact wire, areturn conductor,

a highlresistance bodyand a'low'resistancebody, meiins for connecting the said contact wire with either the said high resistance body or the said low resistance bodyaand means associated with the said high resistance body for breaking the circuit of the said low resistance body.

9. In an electric car controlling system, the combination of a'maln feed wire, acontact'wlre, a return conductor, a high resistance body anda low resistance body connected to the said main feed wire, an electro-magnet and a means associated with the said high resistance body-for discon-' necting the circuit of the said low resistance body and es' tabllshlng, the circuit of the said high resistance body.

10.. In an electric car controlling system, the combination of a main feed wire, a contact wire, a low/resistance body, a plurality of high resistance'bodies for. controlling the amount of current fed from the said main feed wire to the said contact wire, means associated with one of 'the said highh'esistance bodies for disconnecting the circuit through the said low resistance body and establishing. the

( circuit through the other of the said high resistance bodies.

11. In an electric controlling system, the combination fi of almain feed wire, a lowresistance magnet, a contact wire connected in the. circuit of the said low. resistance magnet and a plurality of high resistance magnets for controlling the circuit of the said contact wire and the I said lowyresistance magnet. w g

12. In. anelectric, controlling system. the combination of a main: feed wire, a contact wire, a low resistance mag-- net and. highreslstance body connected to the said main by the said low resistance magnet for controlling the said feed wire and the said contact wire, and means controlled high resistance body.

13. In. an electric car controlling system, the combination of a contact conductor divided into sections. a main. feed.conductor, an, electro-magnet connected with one of the sections of the said contact conductor and the'adjacent portion of said feed conductor, means connectable with said section of said contact conductor for controlling the amount of current fed to the motor otthe car, and a second magnet for controlling said means.

14. In an electric controlling system, the combination of a contact wire, an electro-magnet, a main feed wire connected to the said contact wire through'the said electromagnet, a high resistance electro-magnet connected to the armature of the first-named magnet and controlled thereby, and means'associated with the said high resistance magnet for controiling the current passing through the motor of a car. 7

15.- In an electric car controllingsystem. the combination of a contact wire; a main-feed wire, a low resistancemagnet connected-to the said main feed wire and the said contact wire, a high resistance magnet associated with the low resistance magnet, a'second high resistance magnet connectedwith the said amid conductor and controlled by the first-named high resistance-magnet. I

16; In an electric carcontrolling system, 'the combination of a contact wire, a main teed'wire, a low resistance magnet and a high resistance magnet connected with the -mature of the first-named magnet and to the said return conductor, and means associated with.thc second-named magnet for controlling the amount of current'fcd to the said contact wire.

18. In an electric car controlling system, the comhiua- I tion of a main feed wire, a contact wire, a return conductor, a high resistance magnet and a low resistance magnet connected in branch circuits between the said main feed wire and the said contact wire an electro-magnet for establishing'connections either through the high resistance magnet or the low resistance magnet, andmeans asso ciated with the said :high resistance magnet for prevent ing the 'said electro-magnet from restablishing a circuit through the said low resistance magnet.

19. -I :r an electric car controlling'systein, t-hetombination of flJIlfllIJ feed conductor, a contact jwire, a return conductor, a high resistance body and alo w resistance body connected in branch circuits betweenthe said main feed conductor and the said contactwire, an electro-mag- I net for establishing connections between'said contact wire and the said high resistance body or the said low resist ance body.

20. 'In an electric car controlling system, the combination of a main feed wire, a contact wire, a return conductor, a high resistance body and a low resistance Indy con nected in branch circuits between the said main feed wire and the said conta ct wire, an electro-magnet for establish ing connections between the said contact and either the said low'resistance' body or the said high resistance body,

' .and means associated with the said high resistance body for preventing the saidelectro-maguet from establishing connection between the said low resistance body and the said contact wire I p 21.111411; electric controlling systein, a contact wire having a plurality :01 contact sections, a main feed wire, a low resistancemagnet connected to the said main feed wire and to each of the said sections and: means controlled by thesaid ma nets reducing the amount of current that.

is 'fed to an adjoining section of'the said'contact wire.

22. In an electric controlling system, 'the combina-' tion of acontact wire having a plurality of contact sections. electro-magnets, a main feed wire connected to the said contact sections throngh--the said elcctro-magnets and means controlled by the armature'otthe said eiectromagnet for reducing the amount-of current fed'to joining section of the said contaet'wire.' Y

23. In an electric car controlling system, the combination 'ota main feed wire and a main contact wire having the ad 'apluralityof-contact sections, an electromagnet con nectible with the said main diced "wire and withone 'of the contact sections, said-sections; being normally connected to said feed wire through said electroi'nagnet, a high rc-- sistance magnet connectedwith the said'main feed wl're a-ndconne'ctible with one of the sections of the said contact wire and means associated 'withthe first-named elec- 25. In an electric car'controlling system,'the combina--' tion of a main feed wire, a contact wire having apluraiity of contact sectionsQa low resistance magnet connected to one of the said sections, a resistant body connected to the said main feed wire and another of the said sections, and means associatedwith the said low resistance magnet for controlling the circuit throughthe said resistance body.

26. In an electric cal-"controlling system the combination of a main feed wire, acontactwire having a plurality of contact sections, a low resistance magnet connected to the'sziid feed wire and to the said contact wire, a high resistance magnet connected to the said main feedwire' and to another of the said sections of theysaidcontact' wires. means controlled by'the low resistance magnet for controlling the circuit of the said high resistancemagnet.

27. In anelectric oar controlling system, the minim 28. In an electric car controlling system, the combination of a main feed wire, a contact wire having a plurality of contact sections, a return conductor, an electro-magnet,

29. in an electric car controlling system, the. combina-.

tion of a main feedqvirc, a contact wire ha ving a plurality of contact sections, a low resistance body connected to the said main feed wire and to each o f'the said sectiohsja plurality of high resistance electro-magnets associated with each of the sections preceding the section of the said resistance body, one of the said high resistance elcctromagnets controlled by the said low resistance body and 'the other of the said high resistance electro-magnets controlled by the first-named high resistance electro-magnet, whereby the amount of the current which is fed to each of the said sectionsis controlled. x

30. In an electric car controlling system, the combination of a main feed wire, a contact wire having a plurality of eontactsections, an electro-magnot connected to the said main feed wire' and each of the said sections, a second magnet associated with an adjoining section for controlling the said first-mentioned electro-magnet of the said adjoining section, a high resistance body also controlled by the said-second mentidned electro magnet for controlling the'nmount 01 current fed to the said adjoining section.

31. In an electric car'controllingsystem, the combination of a main feed conductor, a contact wire having a pinrality of contact sectionsy an electrmmagnetconnected with the said main wire and-each of the said sectionsfa high resistance electro-magnet"controllethby the said electro-Iuagn'etand associated with each of v the sections preceding the sections of the said electro-magnet, the said high resistance electro-magnet in turn controlling the circuits of the said electro-magnets of the said preceding sections, a high resistance body having a circuit completed by the operationof the said high resistance electro magnet and connected to the section preceding that of the first-named electro-magnet, whereby the amount of current fed to the said preceding section is controlled.

32. In an electric car controlling system, the combination of a main feed wire, a contact wire having a plurality of sections, a low resistance'magnet and a high resistance magnet connected to the said main feed wire and associated with each of the said sections, a second high resistance electro-magnet controlled by the said low resistance magnet, which in turn controls the circuit of each of.the said low resistance magnets and the first-named. high resistance-magnet ot a section adjoining that of the first-named electro-magnet, whereby the current fed to the'said sections is controlled.

33. In an electric car controlled system, the combination of a main feed conductor, a contact wire having a pm, rality of contact sections, an electro magnet connected to the saidmai'n feed wire and connectible with each of the said sections, a second electro-magnet connected to the armature of the first-named electromagnet and connectime with a section adjoining the section of the first-named electro-magnet, and means connected to the second-named clectro-magnet and the said adjoining section for controlling the amount of current fed to the said adjoining section. v

34. In an electric car controlling system, the combination of a main feed wire, a contact wire having a plurality of contact sections, an electro-magnet connected with the said main feed wire and each of the said sections, a second magnet controlled by -the first-named electro-magnet and associated witheach of the said sections preceding that of the section associated with the first-named electro-magnet, a third electro-magnet associated with each of the said sections and controlled by the-said second-named electro-magnot of each of the sections, the said third-named electromagnct also controlling the current passing through the said second-named electro-magnet of each of the sections.

35. In an electric car controlling system, the combination of a main feed wire, a contact wire having a plurality of contact sections, a low resistance electro-magnet con nected with the said main feed wire and each of the said sections, a plurality of high resistance magnets for controlling the current passing through the said low resistance electro-magnet, the said low resistance electro-magnet controlling the circuit passing through one of thesaid high resistance magnets associated with an adjoining section,

the second high resistance electro-magnet also controlling the first-named high resistance electro-magnet of the said adjoining section, whereby the amount of current fed to the said adjoining section is controlled by the current passing to each of the sections.

36. in an electric car controlling system, he combination of a main feed wire, a contact wire havi g a plurality of contact sections, a plurality of high resistance electromagnets associated with each of the said sections, a low resistance magnet also associated with each of the said sections for controlling the said high resistance electromaguets of'an adjoining section, one of the said ,high resistance electro-magnets controlling the circuit passing through the other of the said high resistance electromagnets, the said second-named high resistance electromagnet also controlling the circuit passing through the first-named high resistance'electro-magnet of an adjoining section.

37. In an electric car controlling system, the combination of a main feed wire, a contact wire having a plurality of contact sections, a return conductor, a high resistance body and a low resistance body co'nnected with the main iced wire and each of the said sections, means connected with the main feed wire and each of the said sections, means connected with the said high resistance body and the said low resistance body for controlling the amount of current fed to each of the preceding sections and means associated with the said high resistance body of each of the said preceding sections for establishing the current through preceding sections and controlled by the said high resistance body and the said low resistance body, the said high resistance body and the said low resistance body of the said preceding section being controlled by the said electromagnet, and means associated with the said high resist- ,ance body for establishing a circuit between the said main teed wire and its contacti section through the said high resistance body.

39. In an electric 'car controlling system, the combination of a main feed wire, a contact wire having-a plurality of contact sections, a return conductor, a high resistance body and a low resistance body connected to the said main feed wire and associatedwith each-of the said contact sections, an electro-magnet associated with an adjoining section and connected to the said high resistance body and the said low resistance body and 'for connecting its associated contact section with the high resistance body and thelow resistance body of that section, and means associated with the high resistance body 'of the lastmentioned section for preventing the said electromagnet from establishing a circuit through the said magnet of that section. v

40. In an electric car controlling system, the combination of a main-feed wire, a contact wire having a plurality of contact sections, a return conductor, a low resistance magnet connected to the said main feed wire and each of the said contact sections, an electro-magnet associated with an adjoining section and controlled by the said low resistance magnet, a high resistance magnet connected to the said main feed wire and each or the said sections andjalso controlling the said electro-magnet associated with the said adjoining section, the circuit of the said high resistance electro-magnet and the said low resistance electro-magnet being controlled by the said first mentioned electro-magnet, whereby the amount of current fed to the section adjoining each of the said sections is' controlled by the presence of the car in the said section.

41. In an electric car controlling system, the combination of a main feed wire, a contact wire having a plurality of contact sections, a return conductor, a low resistance magnet and a plurality of high resistance magnets associated with each of the said sections, the low, resistance magnet-and one of the said high resistance magnets controlling the-circuit of the other high resistance magnet of the preceding section, the said last-named high resistance magnet also controlling the circuit of the said low resistance magnet and the said first-named high resistance magnet of the said preceding, section, and means associated with the first-named high resistance magnet for establishing a circuitgbetween the said contact section and the said firstnamed high resistance magnet independently of the said second-named high resistance magnet, whereby the current passing through either-the high resistance magnet or the low resistance low resistance magnet will control the amount of currentthe said contact wire, anelectro-magnet for controlling the saidcircuits, and means associated-with the high resistance circuit for preventing a change in the amount of current fed to the contact wire until the circuit is broken between the contact wire and the said return conductor.

43. In an electric car controlling system, the combination of a mainfeed wire, a contact wire, a return conductor, an clectro-maguctfor controlling the amount of current fed to the said wire and means associated with the said magnet for preventing any change in the amount of current fed to the s'aid wire until the circuit between the said wire and the said return conductor has been broken.

' 44. In an electric car controlling system, the combinetion of a main feed wire, a contact wire, a return conducconnecting either the said high resistance magnetnor the low resistance body to the said contact wire, whereby the current allowed to pass through the said contact wire will be suflicient to operate the said high resistance magnet.

45. In an electric car controlling system, the combination of a main teed wire, a contact wire, a return conductor, a high resistance electromagnet and a low resistance electro-magnet connected to the said main feed wire, means for connecting either -'the said high-resistance magnet or the low resistance magnet to the said contact wire; an electric motor for operating the said car, a resistance con 'nected in shunt with the said electric motor whereby suflicient current will be allowed to pass through .the said high resistance electromagnet to cause the same to be operated.

In testimony whereofl l have'signed my name to this specification, in the presence of two subscribing witnesses.

CHARLES r. Brmnss.

Witnesses FINLAY Forums FERGUSON, CHAS. J. CALROW. 

